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Point-of-sale security (POS security) is the study of vulnerabilities in retail checkout points and prevention of access by unauthorized parties looking to steal customer and payment card details from them.

The purpose of POS security is creating a safe environment for customer transactions.

Memory scraping POS malware is a major concern, as even large retailers have fallen prey to this credit card-stealing method.

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In late 2013, for example, criminals used a variant of the Backoff memory scraper to access information from over 70,000 accounts in the Target database.

Out of date, unsupported operating systems are a great risk as they provide malware writers with more unpatched vulnerabilities.

Windows XP-based systems still in use in many retail environments are vulnerable because they lack some of the more advanced security features of newer versions.

For the sake of security, POS systems should use only up-to-date and well-supported operating systems.

Point-of-sale systems physical access and user privileges should also be strictly managed.

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